1
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Hu SP, Gao CH, Liu TM, Miao BY, Wang HC, Yu W, Han B. Integrating Olefin Carboamination and Hofmann-Löffler-Freytag Reaction by Radical Deconstruction of Hydrazonyl N-N Bond. Angew Chem Int Ed Engl 2024; 63:e202400168. [PMID: 38380865 DOI: 10.1002/anie.202400168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/13/2024] [Accepted: 02/19/2024] [Indexed: 02/22/2024]
Abstract
As a type of elementary organic compounds containing N-N single bond, hydrazone involved chemical conversions are extremely extensive, but they are mainly limited to N2-retention and N2-removal modes. We report herein an unprecedented protocol for the realization of division utilization of the N2-moiety of hydrazone by a radical facilitated N-N bond deconstruction strategy. This new conversion mode enables the successful combination of alkene carboamination and Hofmann-Löffler-Freytag reaction by the reaction of N-homoallyl mesitylenesulfonyl hydrazones with ethyl difluoroiodoacetate under photocatalytic redox neutral conditions. Mechanism studies reveal that the reaction undergoes a radical relay involving addition, crucial remote imino-N migration and H-atom transfer. Consequently, a series of structurally significant ϵ-N-sulphonamide-α,α-difluoro-γ-amino acid esters are efficiently produced via continuous C-C bond and dual C-N bonds forging.
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Affiliation(s)
- Si-Pei Hu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Chen-Hui Gao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Tu-Ming Liu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Bing-Yang Miao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Hong-Chen Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
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2
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Long J, Liu R, Mu X, Song Z, Zhang Z, Yang Z. Development of a Strategy for the Total Synthesis of Aspidosperma Alkaloids via the Cyclobutenone-Based PET-Initiated Cationic Radical-Driven [2+2]/Retro-Mannich Reaction. Org Lett 2024; 26:2960-2964. [PMID: 38592965 DOI: 10.1021/acs.orglett.4c00540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
A novel strategy for the synthesis of Aspidosperma alkaloids has been achieved via a photoredox-initiated [2+2]/retro-Mannich reaction of tryptamine-substituted enaminones as a key step. The developed chemistry has been applied to the construction of the core tetracycle of Aspidosperma alkaloids (±)-aspidospermidine and (±)-limaspermidine.
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Affiliation(s)
- Jianyu Long
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Rudong Liu
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xinpeng Mu
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhilin Song
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhongchao Zhang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Zhen Yang
- State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education and Beijing National Laboratory for Molecular Science (BNLMS) and Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China
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3
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Labyad SA, Mekkaoui AA, Laayati M, Orfi H, El Firdoussi L, El Houssame S. Selective catalytic synthesis of new terpenic chlorides using NaDCC as an eco-friendly and highly stable FAC agent. RSC Adv 2023; 13:30548-30561. [PMID: 37860172 PMCID: PMC10582686 DOI: 10.1039/d3ra05792e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/09/2023] [Indexed: 10/21/2023] Open
Abstract
A simple, mild and efficient scope pathway for a selective catalytic chlorination of terpenic olefins is investigated in the presence of a highly efficient chlorination agent and a readily available Lewis acid catalyst. The sodium dichloroisocyanurate (NaDCC) used in the present work as an easy handling, sustainable and cost-effective chlorine donor due to its high free available chlorine (FAC), exhibits a high efficiency for selective catalytic chlorination. Herein, we report for the first-time the FeCl2/NaDCC combination system for the selective catalytic chlorination towards new functionalized terpenic olefins. In order to examine the general features of this catalytic reaction, the effects of pH, solvent, dilution, chlorination agent nature, stoichiometry and reaction kinetics are optimized using carvone as a model substrate. Among the studied parameters, catalyst stoichiometry was found to be determinant for highly controllable chlorination selectivity towards new allylic and vinylic chlorides. Indeed, the oxidation state, ligand and metal effects of the catalyst are examined using various Lewis acids, where the chlorinated ones (MClx), such as FeCl2, FeCl3 and SnCl2, exhibit a comprehensive approach for a controllable chlorination reaction. In addition, the homogeneous catalytic system shows good reusability with significant catalytic conversion depending on the FAC content in the reaction medium. The reaction proceeds under mild conditions with shorter reaction time and high selectivity towards new high added value allylic and vinylic chlorinated derivatives of naturally occurring terpenic olefins in good to excellent yields.
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Affiliation(s)
- Salim Adam Labyad
- Laboratoire des Sciences des Matériaux, Mathématiques et Environnement, Université Sultan Moulay Slimane, Faculté Polydisciplinaire de Khouribga Khouribga 25000 BP 145 Morocco
| | - Ayoub Abdelkader Mekkaoui
- Laboratoire de Chimie Moléculaire, Equipe de Chimie de Coordination et de Catalyse, Département de Chimie, Faculté des Sciences Semlalia Marrakech 40001 BP 2390 Morocco
| | - Mouhsine Laayati
- Laboratoire des Sciences des Matériaux, Mathématiques et Environnement, Université Sultan Moulay Slimane, Faculté Polydisciplinaire de Khouribga Khouribga 25000 BP 145 Morocco
- Laboratoire de Chimie Moléculaire, Equipe de Chimie de Coordination et de Catalyse, Département de Chimie, Faculté des Sciences Semlalia Marrakech 40001 BP 2390 Morocco
| | - Hamza Orfi
- Laboratoire des Sciences des Matériaux, Mathématiques et Environnement, Université Sultan Moulay Slimane, Faculté Polydisciplinaire de Khouribga Khouribga 25000 BP 145 Morocco
| | - Larbi El Firdoussi
- Laboratoire de Chimie Moléculaire, Equipe de Chimie de Coordination et de Catalyse, Département de Chimie, Faculté des Sciences Semlalia Marrakech 40001 BP 2390 Morocco
| | - Soufiane El Houssame
- Laboratoire des Sciences des Matériaux, Mathématiques et Environnement, Université Sultan Moulay Slimane, Faculté Polydisciplinaire de Khouribga Khouribga 25000 BP 145 Morocco
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4
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Boehm P, Kehl N, Morandi B. Rhodium-Catalyzed Anti-Markovnikov Transfer Hydroiodination of Terminal Alkynes. Angew Chem Int Ed Engl 2023; 62:e202214071. [PMID: 36336665 PMCID: PMC10107805 DOI: 10.1002/anie.202214071] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/09/2022]
Abstract
A rhodium-catalyzed anti-Markovnikov hydroiodination of aromatic and aliphatic terminal alkynes is reported. Depending on the choice of ligand and substrate, either (E)- or (Z)-configured alkenyl iodides are obtained in high to exclusive isomeric purity. The reaction exhibits a broad substrate scope and high functional group tolerance, employing easily accessible or commercially available aliphatic iodides as HI surrogates through a shuttle process. The synthesized vinyl iodides were applied in several C-C and C-heteroatom bond-forming reactions with full retention of the stereoselectivity. The developed method could be used to significantly shorten the total synthesis of a marine cis-fatty acid. Additionally, initial deuterium-labeling experiments and stoichiometric reactions shed some light on the potential reaction mechanism.
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Affiliation(s)
- Philip Boehm
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093, Zürich, Switzerland
| | - Niklas Kehl
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093, Zürich, Switzerland
| | - Bill Morandi
- Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, HCI, 8093, Zürich, Switzerland
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5
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Kogure Y, Ueno S. Ruthenium-Catalyzed Cross-Coupling of Ketones as an Alkenyl Electrophile with Organoborons via Cleavage of Alkenyl C-N Bonds of in Situ Generated Enamines. Org Lett 2022; 24:9233-9237. [PMID: 36508505 DOI: 10.1021/acs.orglett.2c03765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A ruthenium-catalyzed cross-coupling reaction of ketones with organoboronic esters was developed. In this reaction, ketones possessing a pyridine-directing group directly functions as an alkenyl electrophile for coupling with organoboronates in the presence of pyrrolidine and a ruthenium catalyst. This reaction proceeds via the catalytic cleavage of the alkenyl carbon-nitrogen bond in the enamines generated in situ from ketones with pyrrolidine, benzylamine, or isoindoline.
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Affiliation(s)
- Yuya Kogure
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Satoshi Ueno
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
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6
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Na CG, Kang SH, Sarpong R. Development of a C-C Bond Cleavage/Vinylation/Mizoroki-Heck Cascade Reaction: Application to the Total Synthesis of 14- and 15-Hydroxypatchoulol. J Am Chem Soc 2022; 144:19253-19257. [PMID: 36240482 PMCID: PMC9635941 DOI: 10.1021/jacs.2c09201] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A C-C bond cleavage/vinylation/Mizoroki-Heck cascade reaction has been developed to provide access to densely functionalized bicyclo[2.2.2]octane frameworks. The sequence proceeds through the coupling of dihydroxylated pinene derivatives, prepared from carvone, with gem-dichloroalkenes. The method was applied to 12-step total syntheses of both 14- and 15-hydroxypatchoulol, which provided unambiguous support for the structure of the natural products and corrects a misassignment in the isolation report.
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Affiliation(s)
- Christina G Na
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Suh Hyun Kang
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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7
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Abstract
The classical Wolff–Kishner reduction plays a key role in organic synthesis to convert carbonyl functionalities into methylene groups; however, it generally requires harsh reaction conditions and a strategy with wider applications demands further development.
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Affiliation(s)
- Ruohua Gui
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis, McGill University 801 Sherbrooke St. W., Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Center for Green Chemistry and Catalysis, McGill University 801 Sherbrooke St. W., Montreal, Quebec H3A 0B8, Canada
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8
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Cook A, MacLean H, St. Onge P, Newman SG. Nickel-Catalyzed Reductive Deoxygenation of Diverse C–O Bond-Bearing Functional Groups. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03980] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Haydn MacLean
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Piers St. Onge
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G. Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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9
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Wang S, König B. Katalytische Erzeugung von Carbanionen durch Carbonyl‐Umpolung. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shun Wang
- Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Deutschland
| | - Burkhard König
- Fakultät für Chemie und Pharmazie Universität Regensburg Universitätsstraße 31 93053 Regensburg Deutschland
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10
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Wang S, König B. Catalytic Generation of Carbanions through Carbonyl Umpolung. Angew Chem Int Ed Engl 2021; 60:21624-21634. [PMID: 33991000 PMCID: PMC8518712 DOI: 10.1002/anie.202105469] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Indexed: 12/16/2022]
Abstract
Carbonyl Umpolung is a powerful strategy in organic chemistry to construct complex molecules. Over the last few years, versatile catalytic approaches for the generation of acyl anion equivalents from carbonyl compounds have been developed, but methods to obtain alkyl carbanions from carbonyl compounds in a catalytic fashion are still at an early stage. This Minireview summarizes recent progress in the generation of alkyl carbanions through catalytic carbonyl Umpolung. Two different catalytic approaches can be utilized to enable the generation of alkyl carbanions from carbonyl compounds: the catalytic Wolff–Kishner reaction and the catalytic single‐electron reduction of carbonyl compounds and imines. We discuss the reaction scope, mechanistic insights, and synthetic applications of the methods as well as potential future developments.
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Affiliation(s)
- Shun Wang
- Faculty of Chemistry and Pharmacy University of Regensburg Universitaetsstrasse 31 93053 Regensburg Germany
| | - Burkhard König
- Faculty of Chemistry and Pharmacy University of Regensburg Universitaetsstrasse 31 93053 Regensburg Germany
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11
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Schuppe AW, Knippel JL, Borrajo-Calleja GM, Buchwald SL. Enantioselective Hydroalkenylation of Olefins with Enol Sulfonates Enabled by Dual Copper Hydride and Palladium Catalysis. J Am Chem Soc 2021; 143:5330-5335. [PMID: 33784090 PMCID: PMC8083184 DOI: 10.1021/jacs.1c02117] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The catalytic enantioselective synthesis of α-chiral olefins represents a valuable strategy for rapid generation of structural diversity in divergent syntheses of complex targets. Herein, we report a protocol for the dual CuH- and Pd-catalyzed asymmetric Markovnikov hydroalkenylation of vinyl arenes and the anti-Markovnikov hydroalkenylation of unactivated olefins, in which readily available enol triflates can be utilized as alkenyl coupling partners. This method allowed for the synthesis of diverse α-chiral olefins, including tri- and tetrasubstituted olefin products, which are challenging to prepare by existing approaches.
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Affiliation(s)
- Alexander W Schuppe
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - James Levi Knippel
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Gustavo M Borrajo-Calleja
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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12
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Chaisan N, Ruengsangtongkul S, Tummatorn J, Ruchirawat S, Chainok K, Thongsornkleeb C. Dibrominative Spirocyclization of 2-Butynolyl Anilides: Synthesis of gem-Dibromospirocyclic Benzo[ d][1,3]oxazines and Their Application in the Synthesis of 4 H-Furo[3,2- b]indoles. J Org Chem 2021; 86:4671-4698. [PMID: 33689323 DOI: 10.1021/acs.joc.1c00086] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The combination of catalytic aqueous hydrochloric acid (HCl) and N-bromosuccinimide (NBS) generated electrophilic bromine monochloride (BrCl), which readily induced spiroannulation of 2-alkynolyl anilides (n = 1-3) to form gem-dibromospirocyclic benzo[d][1,3]oxazines in up to 92% yield. The reaction occurred under mild and metal-free conditions using EtOAc as a green solvent. The resulted spirocyclic products contained benzo[d][1,3]oxazine, which was useful both as a pharmacophore and synthetic precursor. In addition, the current protocol allowed to effortlessly introduce the sp3-gem-dibromide carbon adjacent to the sterically demanding spiroketal center. These spiroheterocycles (n = 1) were shown to be synthetically versatile and conveniently maneuvered. Base-promoted debrominative aromatization of these spirocycles unmasked rare and synthetically useful 2-aryl-3-bromofurans in mostly excellent yields. These 3-bromofurans were well-suited substrates for intramolecular Ullmann C-N bond coupling to construct difficult-to-prepare 4H-furo[3,2-b]indoles. Additionally, the current protocol was flexible and adaptable to preparing the gem-dichloride variants.
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Affiliation(s)
- Nattawadee Chaisan
- Program on Chemical Biology, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Sureeporn Ruengsangtongkul
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Program on Chemical Biology, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Program on Chemical Biology, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Kittipong Chainok
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Charnsak Thongsornkleeb
- Laboratory of Organic Synthesis, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Program on Chemical Biology, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
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13
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Ou W, Xiang X, Zou R, Xu Q, Loh KP, Su C. Room‐Temperature Palladium‐Catalyzed Deuterogenolysis of Carbon Oxygen Bonds towards Deuterated Pharmaceuticals. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Ou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 China
| | - Xudong Xiang
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 China
| | - Ru Zou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 China
| | - Qing Xu
- College of Chemistry and Materials Engineering Wenzhou University Wenzhou Zhejiang China
| | - Kian Ping Loh
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore
| | - Chenliang Su
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province Institute of Microscale Optoelectronics Shenzhen University Shenzhen 518060 China
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14
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Ou W, Xiang X, Zou R, Xu Q, Loh KP, Su C. Room-Temperature Palladium-Catalyzed Deuterogenolysis of Carbon Oxygen Bonds towards Deuterated Pharmaceuticals. Angew Chem Int Ed Engl 2021; 60:6357-6361. [PMID: 33332703 DOI: 10.1002/anie.202014196] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Indexed: 12/26/2022]
Abstract
Site-specific incorporation of deuterium into drug molecules to study and improve their biological properties is crucial for drug discovery and development. Herein, we describe a palladium-catalyzed room-temperature deuterogenolysis of carbon-oxygen bonds in alcohols and ketones with D2 balloon for practical synthesis of deuterated pharmaceuticals and chemicals with benzyl-site (sp3 C-H) D-incorporation. The highlights of this deoxygenative deuteration strategy are mild conditions, broad scope, practicability and high chemoselectivity. To enable the direct use of D2 O, electrocatalytic D2 O-splitting is adapted to in situ supply D2 on demand. With this system, the precise incorporation of deuterium in the metabolic position (benzyl-site) of ibuprofen is demonstrated in a sustainable and practical way with D2 O.
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Affiliation(s)
- Wei Ou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Xudong Xiang
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Ru Zou
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Qing Xu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang, China
| | - Kian Ping Loh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Chenliang Su
- International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
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15
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Xu L, Zhu S, Huo L, Chen F, Yu W, Chu L. Radical 1,2-addition of bromoarenes to alkynes via dual photoredox and nickel catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo00365h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A 1,2-addition of aryl bromides to alkynes enabled by the photocatalytic generation of bromine radicals via photoredox and nickel catalysis is reported.
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Affiliation(s)
- Lei Xu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Shengqing Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Liping Huo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Fan Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Wei Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Lingling Chu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- Center for Advanced Low-Dimension Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
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16
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Catalytic Allylic Chlorination of Natural Terpenic Olefins Using Supported and Nonsupported Lewis Acid Catalysts. J CHEM-NY 2020. [DOI: 10.1155/2020/2563634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A mild and convenient method for the allylic chlorination of naturally occurring terpenic olefins was investigated in the presence of different supported and non-supported Lewis acid catalysts. The reaction has been tested on carvone as a model substrate in the presence of sodium hypochlorite as chlorine donor. The scope and limitations of transition metal-based Lewis acid catalysts, stoichiometry, and substrate structure were evaluated. Among the iron precursors used, FeCl3 and FeCl2 provide the promise of a general approach to allylic or vinylic chlorination reaction. Various terpenic olefins were examined in the presence of FeCl3/NaOCl combination system. The catalytic chlorination proceeds under mild conditions with short reaction time and shows a high selectivity affording the corresponding chlorides in good to excellent yields.
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17
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Schuster CH, Dropinski JF, Shevlin M, Li H, Chen S. Ruthenium-Catalyzed Enantioselective Hydrogenation of Hydrazones. Org Lett 2020; 22:7562-7566. [PMID: 32946691 DOI: 10.1021/acs.orglett.0c02756] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Prochiral hydrazones undergo efficient and highly selective hydrogenation in the presence of a chiral diphosphine ruthenium catalyst, yielding enantioenriched hydrazine products (up to 99% ee). The mild reaction conditions and broad functional group tolerance of this method allow access to versatile chiral hydrazine building blocks containing aryl bromide, heteroaryl, alkyl, cycloalkyl, and ester substituents. This method was also demonstrated on >150 g scale, providing a valuable hydrazine intermediate en route to an active pharmaceutical ingredient.
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Affiliation(s)
- Christopher H Schuster
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - James F Dropinski
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Michael Shevlin
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Hongming Li
- Department of Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Song Chen
- Department of Synthetic Chemistry, Pharmaron Beijing Co., Ltd., No. 6, Tai-He Road, BDA, Beijing, 100176, P. R. China
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18
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Fang Z, Qi L, Song J, Ren P, Hou C, Ji S, Wang L, Li W. PhI(OAc)
2
‐Promoted 1,2‐Diaza‐Cope Rearrangement of β,γ‐Unsaturated Hydrazones with Acetate/H
2
O: Access to Diacyl/Acyl
N
‐Allylhydrazines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhuo‐Yue Fang
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Lin Qi
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Jin‐Yan Song
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Pei‐Xing Ren
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Cong‐Ying Hou
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Shi‐Chao Ji
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Li‐Jing Wang
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
- Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education Key Laboratory of Chemical Biology of Hebei Province Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
| | - Wei Li
- College of Chemistry & Environmental Science Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
- Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education Key Laboratory of Chemical Biology of Hebei Province Hebei University 180 Wusi Donglu 071002 Baoding P. R. China
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19
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Pitsinos EN, Mavridis I, Tzouma E, Vidali VP. Enantioselective Synthesis of Cassane-Type Furanoditerpenoids: Total Synthesis of Sucutiniranes C and D. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000724] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Emmanuel N. Pitsinos
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Ioannis Mavridis
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Eirini Tzouma
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
| | - Veroniki P. Vidali
- Institute of Nanoscience and Nanotechnology; National Centre of Scientific Research “Demokritos”; P.O. Box 60037 15310 Agia Paraskevi Attikis Greece
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20
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Engl S, Reiser O. Copper Makes the Difference: Visible Light-Mediated Atom Transfer Radical Addition Reactions of Iodoform with Olefins. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02984] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Sebastian Engl
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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21
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Shaw K, Niyogi S, Nandi R, Bisai V. Catalytic asymmetric total syntheses of (+)-α-cuparenone, (+)-cuparene and (+)-herbertene. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Khatua A, Pal S, Bisai V. Formal Total Syntheses of (+)- and (-)- ar
-Macrocarpene via Rh (I)
-BINAP Catalyzed Conjugate Addition. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Arindam Khatua
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462 066 Bhopal - Madhya Pradesh India
| | - Souvik Pal
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462 066 Bhopal - Madhya Pradesh India
| | - Vishnumaya Bisai
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462 066 Bhopal - Madhya Pradesh India
- Department of Chemistry; Indian Institute of Science Education and Research Tirupati; Transit Campus, Mangalam, Karkambadi Road 517 507 Tirupati - Andhra Pradesh India
- Department of Chemical Sciences; Indian Institute of Science Education and Research Berhampur; Transit Campus, Engg. School Junction (Govt. ITI Building) 760 010 Berhampur - Odisha India
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23
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24
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Sunnapu R, Banoth SN, R S R, Thomas A, Venugopal N, Rajendar G. Stereoselective Total Synthesis of (-)-(2 S,4 R)-3'-Methoxyl Citreochlorol: Preparation and Use of New Proline-Based Auxiliary for Asymmetric Acetate Aldol Reaction. J Org Chem 2020; 85:4103-4113. [PMID: 32048505 DOI: 10.1021/acs.joc.9b03227] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first stereoselective total synthesis of (-)-(2S,4R)-3'-methoxy citreochlorol and (-)-(2S,4S)-3'-methoxy citreochlorol is demonstrated. A proline-based imidazolidinone was synthesized and used as chiral auxiliary for asymmetric acetate aldol reaction to generate initial chirality in the targeted molecule. Geminal dichloromethane functionality was introduced by the addition of in situ generated dichloromethyllithium to Weinreb's amide functional group.
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Affiliation(s)
- Ranganayakulu Sunnapu
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
| | - Saikumar Naik Banoth
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
| | - Reyno R S
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
| | - Aleena Thomas
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
| | - Navyasree Venugopal
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
| | - Goreti Rajendar
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala 695551, India
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25
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Khatua A, Roy A, Bisai V. Catalytic asymmetric total syntheses of sesquiterpenoids, (+)- and ( )-ar-macrocarpene. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Li J, Devi Laishram R, Chen J, Xu D, Shi G, Lv H, Fan R, Fan B. Regioselective Hydroiodination of Alkynes by in situ‐Generated HI. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiayan Li
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Ronibala Devi Laishram
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Dandan Xu
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Guangrui Shi
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Haiping Lv
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Ruifeng Fan
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
| | - Baomin Fan
- Key Laboratory of Chemistry in Ethnic Medicinal ResourcesYunnan Minzu University Yunnan, Kunming 650500 China
- School of Chemistry and EnvironmentYunnan Minzu University Yunnan, Kunming 650500 China
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27
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Recyclable Pd/C catalyzed one-step reduction of carbonyls to hydrocarbons under simple conditions without extra base. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Ng JPL, Coghi P, Law BYK, Liu L, Wong VKW. The present and future synthetic strategies of structural modifications of sinomenine. Org Chem Front 2020. [DOI: 10.1039/d0qo00785d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review summarizes the modifications of sinomenine, a hot compound derived from herbal plants, which possesses diverse biological activities and low cytotoxicity.
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Affiliation(s)
- Jerome P. L. Ng
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Paolo Coghi
- School of Pharmacy
- Macau University of Science and Technology
- Taipa
- China
| | - Betty Yuen Kwan Law
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Liang Liu
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
| | - Vincent Kam Wai Wong
- State Key Laboratory of Quality Research in Chinese Medicine
- Macau University of Science and Technology
- Taipa
- China
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29
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Fu WC, Kwong FY. A denitrogenative palladium-catalyzed cascade for regioselective synthesis of fluorenes. Chem Sci 2019; 11:1411-1417. [PMID: 34123265 PMCID: PMC8148384 DOI: 10.1039/c9sc04062e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
We herein report a denitrogenative palladium-catalyzed cascade for the modular and regioselective synthesis of polysubstituted fluorenes. Hydrazone facilitates the Pd(ii) to Pd(iv) oxidative addition in a Catellani pathway and is also the methylene synthon in the proposed reaction. Aryl iodides and 2-bromoarylaldehyde hydrazones undergo a norbornene-controlled tandem reaction sequence to give a broad scope of fluorenes in the presence of a palladium catalyst. The method described is scalable and adaptable to a three-component reaction with in situ generation of the hydrazone group. Preliminary mechanistic investigations have been conducted.
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Affiliation(s)
- Wai Chung Fu
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin New Territories Hong Kong
| | - Fuk Yee Kwong
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin New Territories Hong Kong
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30
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Synthesis, crystal structure and spectral characterization of (Z)-2,8-dibromo-9-(bromomethylene)-3,5,5-trimethyl-6,7,8,9-tetrahydro-5H-benzo [7] annulene. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Hofstra JL, Poremba KE, Shimozono AM, Reisman SE. Nickel-Catalyzed Conversion of Enol Triflates into Alkenyl Halides. Angew Chem Int Ed Engl 2019; 58:14901-14905. [PMID: 31410936 PMCID: PMC7179072 DOI: 10.1002/anie.201906815] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/09/2019] [Indexed: 12/26/2022]
Abstract
A Ni-catalyzed halogenation of enol triflates was developed and it enables the synthesis of a broad range of alkenyl iodides, bromides, and chlorides under mild reaction conditions. The reaction utilizes inexpensive, bench-stable Ni(OAc)2 ⋅4 H2 O as a precatalyst and proceeds at room temperature in the presence of sub-stoichiometric Zn and either 1,5-cyclooctadiene or 4-(N,N-dimethylamino)pyridine.
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Affiliation(s)
- Julie L. Hofstra
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena, CA 91125 (USA)
| | - Kelsey E. Poremba
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena, CA 91125 (USA)
| | - Alex M. Shimozono
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena, CA 91125 (USA)
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology Pasadena, CA 91125 (USA)
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32
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Hofstra JL, Poremba KE, Shimozono AM, Reisman SE. Nickel‐Catalyzed Conversion of Enol Triflates into Alkenyl Halides. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906815] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Julie L. Hofstra
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Kelsey E. Poremba
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Alex M. Shimozono
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Sarah E. Reisman
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
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33
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Abstract
This report features the first catalytic asymmetric total synthesis of a sesquiterpene, (+)-ar-macrocarpene (1), in 7 steps with 42.1% overall yields from commercially available inexpensive 5,5-dimethylcyclohexane 1,3-dione. This strategy relies on a key [3,3]-sigmatropic rearrangement effecting reductive transposition through allylic diazene rearrangement (ADR) in a single step from intermediate allylic alcohol (+)-12 under the Mitsunobu reaction conditions with o-nitrobenzenesulfonyl hydrazide (o-NBSH). Enantioselective reduction of α-bromo vinylogous ester 16 under the Corey-Bakshi-Shibata reduction conditions forges the required stereocenter in the allylic alcohol (+)-12 in a highly enantioenriched manner (95% ee).
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Affiliation(s)
- Arindam Khatua
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Sovan Niyogi
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Vishnumaya Bisai
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India. and Department of Chemistry, IISER Berhampur, Transit Campus (Govt. ITI Building), Engg. School Junction, Berhampur, Odisha - 760 010, India and Department of Chemistry, IISER Tirupati, Rami Reddy Nagar, Karkambadi Road, Mangalam, Tirupati - 517 507, India
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34
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Allouche EMD, Charette AB. Non-stabilized diazoalkane synthesis via the oxidation of free hydrazones by iodosylbenzene and application in in situ MIRC cyclopropanation. Chem Sci 2019; 10:3802-3806. [PMID: 31015921 PMCID: PMC6457201 DOI: 10.1039/c8sc05558k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 02/18/2019] [Indexed: 12/15/2022] Open
Abstract
Electron-rich alkyl diazo compounds are powerful reagents in organic synthesis, but the risks associated with their toxicity and instability often limit their uses. Herein we describe an efficient, easy-to-handle and safe batch protocol for the in situ generation and cyclopropanation of these highly reactive non-stabilized diazoalkanes through the oxidation of free hydrazones using iodosylbenzene. Numerous substituted cyclopropanes have been synthesized using this methodology, including various gem-dimethylcyclopropanes of particular interest in medicinal chemistry.
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Affiliation(s)
- Emmanuelle M D Allouche
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
| | - André B Charette
- Department of Chemistry , Université de Montréal , P. O. Box 6128 Station Downtown , Montreal , Quebec , H3C 3J7 Canada .
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35
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Zhang YX, Jin RX, Yin H, Li Y, Wang XS. Copper-Catalyzed Dichloromethylazidation of Alkenes Using BrCCl2H as a Stoichiometric Dichloromethylating Reagent. Org Lett 2018; 20:7283-7287. [DOI: 10.1021/acs.orglett.8b03208] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya-Xuan Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Han Yin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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36
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Kutsumura N, Nagase H. Unique Reactions of Morphinan Skeletons and Conversions of the Skeletons to Active Alkaloids. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Hiroshi Nagase
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba
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37
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O' Donovan DH, Aillard P, Berger M, de la Torre A, Petkova D, Knittl‐Frank C, Geerdink D, Kaiser M, Maulide N. C‐H‐Aktivierung ermöglicht eine kurze Totalsynthese von Chinin und Analoga mit erhöhter Anti‐Malaria‐Aktivität. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804551] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel H. O' Donovan
- AstraZenecaOncology, IMED Biotech Unit 1 Francis Crick Avenue Cambridge CB2 0RE Großbritannien
| | - Paul Aillard
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
| | - Martin Berger
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
| | - Aurélien de la Torre
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
| | - Desislava Petkova
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
| | | | - Danny Geerdink
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
| | - Marcel Kaiser
- Schweizerisches Tropen- und Public-Health-Institut Socinstrasse 57 4002 Basel Schweiz
- Universität Basel 4003 Basel Schweiz
| | - Nuno Maulide
- Institut für Organische ChemieUniversität Wien Währinger Straße 38 1090 Wien Österreich
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38
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O' Donovan DH, Aillard P, Berger M, de la Torre A, Petkova D, Knittl-Frank C, Geerdink D, Kaiser M, Maulide N. C-H Activation Enables a Concise Total Synthesis of Quinine and Analogues with Enhanced Antimalarial Activity. Angew Chem Int Ed Engl 2018; 57:10737-10741. [PMID: 29761878 PMCID: PMC6146912 DOI: 10.1002/anie.201804551] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Indexed: 11/09/2022]
Abstract
We report a novel approach to the classical natural product quinine that is based on two stereoselective key steps, namely a C-H activation and an aldol reaction, to unite the two heterocyclic moieties of the target molecule. This straightforward and flexible strategy enables a concise synthesis of natural (-)-quinine, the first synthesis of unnatural (+)-quinine, and also provides access to unprecedented C3-aryl analogues, which were prepared in only six steps. We additionally demonstrate that these structural analogues exhibit improved antimalarial activity compared with (-)-quinine both in vitro and in mice infected with Plasmodium berghei.
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Affiliation(s)
- Daniel H O' Donovan
- AstraZeneca, Oncology, IMED Biotech Unit, 1 Francis Crick Avenue, Cambridge, CB2 0RE, UK
| | - Paul Aillard
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Martin Berger
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Aurélien de la Torre
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Desislava Petkova
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Christian Knittl-Frank
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Danny Geerdink
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002, Basel, Switzerland.,University of Basel, 4003, Basel, Switzerland
| | - Nuno Maulide
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
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39
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Yan SS, Zhu L, Ye JH, Zhang Z, Huang H, Zeng H, Li CJ, Lan Y, Yu DG. Ruthenium-catalyzed umpolung carboxylation of hydrazones with CO 2. Chem Sci 2018; 9:4873-4878. [PMID: 29910940 PMCID: PMC5982211 DOI: 10.1039/c8sc01299g] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 04/27/2018] [Indexed: 11/26/2022] Open
Abstract
The first ruthenium-catalyzed umpolung carboxylation of hydrazones with CO2 to generate important aryl acetic acids is reported.
The first ruthenium-catalyzed umpolung carboxylation of hydrazones with CO2 to generate important aryl acetic acids is reported. Besides aldehyde hydrazones, a variety of ketone hydrazones, which have not been successfully applied in previous umpolung reactions with other reactive electrophiles, also show high reactivity and selectivity under mild conditions. Moreover, this operationally simple protocol features good functional group tolerance, is readily scalable, and offers easy derivation of important structures, including bioactive felbinac and adiphenine. Computational studies reveal that this umpolung reaction proceeds through the generation of a Ru-nitrenoid followed by concerted [4 + 2] cycloaddition with CO2.
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Affiliation(s)
- Si-Shun Yan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , P. R. China .
| | - Lei Zhu
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 400030 , P. R. China .
| | - Jian-Heng Ye
- Key Laboratory of Green Chemistry & Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , P. R. China .
| | - Zhen Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , P. R. China .
| | - He Huang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , P. R. China .
| | - Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , P. R. China
| | - Chao-Jun Li
- The State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , P. R. China.,Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| | - Yu Lan
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 400030 , P. R. China .
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education , College of Chemistry , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , P. R. China . .,State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin 300071 , P. R. China
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40
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Rullière P, Benoit G, Allouche EMD, Charette AB. Safe and Facile Access to Nonstabilized Diazoalkanes Using Continuous Flow Technology. Angew Chem Int Ed Engl 2018; 57:5777-5782. [DOI: 10.1002/anie.201802092] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Pauline Rullière
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Guillaume Benoit
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Emmanuelle M. D. Allouche
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
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41
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Rullière P, Benoit G, Allouche EMD, Charette AB. Safe and Facile Access to Nonstabilized Diazoalkanes Using Continuous Flow Technology. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Pauline Rullière
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Guillaume Benoit
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - Emmanuelle M. D. Allouche
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Faculty of Arts and Sciences; Department of Chemistry; Université de Montreal; P.O. Box 6128 Station Downtown Montreal Quebec H3C 3J7 Canada
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42
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Anil SM, Vinayaka AC, Rajeev N, Swaroop TR, Mallesha N, Rangappa KS, Sadashiva MP. Aqueous Chloroplatinic Acid: A Green, Chemoselective and Reusable Catalyst for the Deprotection of Acetals, Ketals, Dioxolanes and Oxathiolanes. ChemistrySelect 2018. [DOI: 10.1002/slct.201800032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Seegehalli M Anil
- Department of Studies in Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
- Sri Ram Chem; Plot No. 31, JCK industrial park, Mysuru Karnataka 570 016 India
| | - Ajjampura C Vinayaka
- Department of Studies in Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
| | - Narasimhamurthy Rajeev
- Department of Studies in Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
| | - Toreshettahally R Swaroop
- Department of Studies in Organic Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
| | - Ningegowda Mallesha
- Sri Ram Chem; Plot No. 31, JCK industrial park, Mysuru Karnataka 570 016 India
| | - Kanchugarakoppal S Rangappa
- Department of Studies in Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
- Institution of Excellence, Vijnana Bhavan; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
| | - Maralinganadoddi P Sadashiva
- Department of Studies in Chemistry; University of Mysore; Manasagangothri, Mysuru Karnataka 570 006 India
- Sri Ram Chem; Plot No. 31, JCK industrial park, Mysuru Karnataka 570 016 India
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43
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Robinson EE, Thomson RJ. A Strategy for the Convergent and Stereoselective Assembly of Polycyclic Molecules. J Am Chem Soc 2018; 140:1956-1965. [PMID: 29309727 DOI: 10.1021/jacs.7b13234] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The stereoselective oxidative coupling of cyclic ketones via silyl bis-enol ethers followed by ring-closing metathesis is shown to be a general and powerful reaction sequence for the preparation of diverse polycyclic scaffolds from simple precursors. The modular strategy successfully constructs substructures prevalent in numerous bioactive natural product families, varying in substitution and carbocyclic composition. Several of the prepared compounds were shown to possess potent cytotoxic activity against a panel of tumor cell lines. The utility of this strategy was further demonstrated by a concise and highly convergent 17-step formal synthesis of the complex antimalarial marine diterpene, (+)-7,20-diisocyanoadociane.
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Affiliation(s)
- Emily E Robinson
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Regan J Thomson
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States
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44
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Tang J, Lv L, Dai XJ, Li CC, Li L, Li CJ. Nickel-catalyzed cross-coupling of aldehydes with aryl halides via hydrazone intermediates. Chem Commun (Camb) 2018; 54:1750-1753. [PMID: 29379918 DOI: 10.1039/c7cc09290c] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A novel nickel-catalyzed cross-coupling reaction between aldehydes and aryl halides via hydrazone intermediates has been developed. It merges the Wolff–Kishner reduction and classical cross-coupling reactions, thus opening up new routes in designing chemical synthesis.
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Affiliation(s)
- Jianting Tang
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
| | - Leiyang Lv
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
| | - Xi-Jie Dai
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
| | - Chen-Chen Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
| | - Lu Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis
- McGill University
- 801 Sherbrook Street West
- Montreal
- Quebec H3A 0B8
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45
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Yamamoto N, Okada T, Harada Y, Kutsumura N, Imaide S, Saitoh T, Fujii H, Nagase H. The application of a specific morphinan template to the synthesis of galanthamine. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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46
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Affiliation(s)
- Shu-An Liu
- Department
of Chemistry and Center for Integrated Protein Science, Ludwig-Maximilian University Munich, Butenandtstraße 5-13, 81377 Munich, Germany
| | - Dirk Trauner
- Department
of Chemistry and Center for Integrated Protein Science, Ludwig-Maximilian University Munich, Butenandtstraße 5-13, 81377 Munich, Germany
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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47
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Zhao Z, Kulkarni KG, Murphy GK. Synthesis of Aryldihalomethanes by Denitrogenative Dihalogenation of Benzaldehyde Hydrazones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700393] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhensheng Zhao
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
| | - Kaivalya G. Kulkarni
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
| | - Graham K. Murphy
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
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48
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Lévesque É, Laporte ST, Charette AB. Continuous Flow Synthesis and Purification of Aryldiazomethanes through Hydrazone Fragmentation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608444] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Éric Lévesque
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
| | - Simon T. Laporte
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
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49
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Lévesque É, Laporte ST, Charette AB. Continuous Flow Synthesis and Purification of Aryldiazomethanes through Hydrazone Fragmentation. Angew Chem Int Ed Engl 2016; 56:837-841. [DOI: 10.1002/anie.201608444] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/16/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Éric Lévesque
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
| | - Simon T. Laporte
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
| | - André B. Charette
- Department of Chemistry Université de Montréal P.O. Box 6128 Stn Downtown Montreal Quebec H3C 3J7 Canada
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50
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Dong K, Yan B, Chang S, Chi Y, Qiu L, Xu X. Transition-Metal-Free Fluoroarylation of Diazoacetamides: A Complementary Approach to 3-Fluorooxindoles. J Org Chem 2016; 81:6887-92. [PMID: 27366998 DOI: 10.1021/acs.joc.6b01286] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient transition-metal-free fluoroarylation reaction of N-aryl diazoacetamides with NFSI (N-fluorobenzenesulfonimide) is described. This reaction directly provides 3-fluorooxindole derivatives in yields of 67-93% with high selectivity via a carbene-free process under mild reaction conditions.
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Affiliation(s)
- Kuiyong Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Bin Yan
- Jinghua Anti-cancer Pharmaceutical Engineering Center , Nantong 226407, China
| | - Sailan Chang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Yongjian Chi
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
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